How severe is CVE-2017-12121?

CVE-2017-12121 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-12121 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-12121?

CVE-2017-12121 affects Moxa Edr-810 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-12121?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2017-12121 published?

CVE-2017-12121 was published on 2018-05-14 and last updated on 2026-06-17.

CVE-2017-12121

CVE-2017-12121 is a high-severity vulnerability in Moxa Edr-810 Firmware with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Moxa Edr-810 Firmware
Published: 2018-05-14
Last modified: 2026-06-17

Description

An exploitable command injection vulnerability exists in the web server functionality of Moxa EDR-810 V4.1 build 17030317. A specially crafted HTTP POST can cause a privilege escalation resulting in root shell. An attacker can inject OS commands into the rsakey\_name= parm in the "/goform/WebRSAKEYGen" uri to trigger this vulnerability.

Frequently asked questions

What is CVE-2017-12121?: An exploitable command injection vulnerability exists in the web server functionality of Moxa EDR-810 V4.1 build 17030317. A specially crafted HTTP POST can cause a privilege escalation resulting in root shell. An attacker can inject OS commands into the rsakey\_name= parm in the "/goform/WebRSAKEYGen" uri to trigger this vulnerability.
How severe is CVE-2017-12121?: CVE-2017-12121 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-12121 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-12121?: CVE-2017-12121 affects Moxa Edr-810 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-12121?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2017-12121 published?: CVE-2017-12121 was published on 2018-05-14 and last updated on 2026-06-17.

References

https://www.talosintelligence.com/vulnerability_reports/TALOS-2017-0473

Affected products (1)

cpe:2.3:o:moxa:edr-810_firmware:4.1:*:*:*:*:*:*:*

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